Wettability and its influence on graphene nansoheets as electrode material for capacitive deionization

Baoping Jia, Linda Zou

Research output: Contribution to journalArticlepeer-review

113 Scopus citations

Abstract

Wetting behavior on graphene nanosheets and their application in capacitive deionization were discussed in this research. By altering the hydrophilicity of graphene nanosheets (GNS) through controlled introduction of sulphonic groups, the water contact angle of GNS is much reduced, indicating a better wettability. Meanwhile, the sulphonated GNS showed better dispersion and higher specific surface area, probably due to the negatively charged -SO3- acting as a repellent on the surface to prevent serious aggregation. As a result, a salt removal efficiency of 83.4% and specific electrosorptive capacity of 8.6 mg/g, indicating an increase of 109% comparing with the unmodified GNS.

Original languageBritish English
Pages (from-to)23-28
Number of pages6
JournalChemical Physics Letters
Volume548
DOIs
StatePublished - 1 Oct 2012

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